/Engine/Source/Runtime/Datasmith/DatasmithCore/Public/IDatasmithSceneElements.h
Get the i-th material override of this actor
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IDatasmithMaterialIDElement](API\Runtime\DatasmithCore\IDatasmithMaterialIDElement) > GetMaterialOverride ( int32 i )